diff options
Diffstat (limited to 'src/core/debugger/gdbstub.cpp')
| -rw-r--r-- | src/core/debugger/gdbstub.cpp | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/core/debugger/gdbstub.cpp b/src/core/debugger/gdbstub.cpp index 884229c77..a64a9ac64 100644 --- a/src/core/debugger/gdbstub.cpp +++ b/src/core/debugger/gdbstub.cpp @@ -606,6 +606,8 @@ void GDBStub::HandleQuery(std::string_view command) { } else if (command.starts_with("StartNoAckMode")) { no_ack = true; SendReply(GDB_STUB_REPLY_OK); + } else if (command.starts_with("Rcmd,")) { + HandleRcmd(Common::HexStringToVector(command.substr(5), false)); } else { SendReply(GDB_STUB_REPLY_EMPTY); } @@ -645,6 +647,155 @@ void GDBStub::HandleVCont(std::string_view command, std::vector<DebuggerAction>& } } +constexpr std::array<std::pair<const char*, Kernel::Svc::MemoryState>, 22> MemoryStateNames{{ + {"----- Free -----", Kernel::Svc::MemoryState::Free}, + {"Io ", Kernel::Svc::MemoryState::Io}, + {"Static ", Kernel::Svc::MemoryState::Static}, + {"Code ", Kernel::Svc::MemoryState::Code}, + {"CodeData ", Kernel::Svc::MemoryState::CodeData}, + {"Normal ", Kernel::Svc::MemoryState::Normal}, + {"Shared ", Kernel::Svc::MemoryState::Shared}, + {"AliasCode ", Kernel::Svc::MemoryState::AliasCode}, + {"AliasCodeData ", Kernel::Svc::MemoryState::AliasCodeData}, + {"Ipc ", Kernel::Svc::MemoryState::Ipc}, + {"Stack ", Kernel::Svc::MemoryState::Stack}, + {"ThreadLocal ", Kernel::Svc::MemoryState::ThreadLocal}, + {"Transfered ", Kernel::Svc::MemoryState::Transfered}, + {"SharedTransfered", Kernel::Svc::MemoryState::SharedTransfered}, + {"SharedCode ", Kernel::Svc::MemoryState::SharedCode}, + {"Inaccessible ", Kernel::Svc::MemoryState::Inaccessible}, + {"NonSecureIpc ", Kernel::Svc::MemoryState::NonSecureIpc}, + {"NonDeviceIpc ", Kernel::Svc::MemoryState::NonDeviceIpc}, + {"Kernel ", Kernel::Svc::MemoryState::Kernel}, + {"GeneratedCode ", Kernel::Svc::MemoryState::GeneratedCode}, + {"CodeOut ", Kernel::Svc::MemoryState::CodeOut}, + {"Coverage ", Kernel::Svc::MemoryState::Coverage}, +}}; + +static constexpr const char* GetMemoryStateName(Kernel::Svc::MemoryState state) { + for (size_t i = 0; i < MemoryStateNames.size(); i++) { + if (std::get<1>(MemoryStateNames[i]) == state) { + return std::get<0>(MemoryStateNames[i]); + } + } + return "Unknown "; +} + +static constexpr const char* GetMemoryPermissionString(const Kernel::Svc::MemoryInfo& info) { + if (info.state == Kernel::Svc::MemoryState::Free) { + return " "; + } + + switch (info.permission) { + case Kernel::Svc::MemoryPermission::ReadExecute: + return "r-x"; + case Kernel::Svc::MemoryPermission::Read: + return "r--"; + case Kernel::Svc::MemoryPermission::ReadWrite: + return "rw-"; + default: + return "---"; + } +} + +static VAddr GetModuleEnd(Kernel::KPageTable& page_table, VAddr base) { + Kernel::Svc::MemoryInfo mem_info; + VAddr cur_addr{base}; + + // Expect: r-x Code (.text) + mem_info = page_table.QueryInfo(cur_addr).GetSvcMemoryInfo(); + cur_addr = mem_info.base_address + mem_info.size; + if (mem_info.state != Kernel::Svc::MemoryState::Code || + mem_info.permission != Kernel::Svc::MemoryPermission::ReadExecute) { + return cur_addr - 1; + } + + // Expect: r-- Code (.rodata) + mem_info = page_table.QueryInfo(cur_addr).GetSvcMemoryInfo(); + cur_addr = mem_info.base_address + mem_info.size; + if (mem_info.state != Kernel::Svc::MemoryState::Code || + mem_info.permission != Kernel::Svc::MemoryPermission::Read) { + return cur_addr - 1; + } + + // Expect: rw- CodeData (.data) + mem_info = page_table.QueryInfo(cur_addr).GetSvcMemoryInfo(); + cur_addr = mem_info.base_address + mem_info.size; + return cur_addr - 1; +} + +void GDBStub::HandleRcmd(const std::vector<u8>& command) { + std::string_view command_str{reinterpret_cast<const char*>(&command[0]), command.size()}; + std::string reply; + + auto* process = system.CurrentProcess(); + auto& page_table = process->PageTable(); + + if (command_str == "get info") { + Loader::AppLoader::Modules modules; + system.GetAppLoader().ReadNSOModules(modules); + + reply = fmt::format("Process: {:#x} ({})\n" + "Program Id: {:#018x}\n", + process->GetProcessID(), process->GetName(), process->GetProgramID()); + reply += + fmt::format("Layout:\n" + " Alias: {:#012x} - {:#012x}\n" + " Heap: {:#012x} - {:#012x}\n" + " Aslr: {:#012x} - {:#012x}\n" + " Stack: {:#012x} - {:#012x}\n" + "Modules:\n", + page_table.GetAliasRegionStart(), page_table.GetAliasRegionEnd(), + page_table.GetHeapRegionStart(), page_table.GetHeapRegionEnd(), + page_table.GetAliasCodeRegionStart(), page_table.GetAliasCodeRegionEnd(), + page_table.GetStackRegionStart(), page_table.GetStackRegionEnd()); + + for (const auto& [vaddr, name] : modules) { + reply += fmt::format(" {:#012x} - {:#012x} {}\n", vaddr, + GetModuleEnd(page_table, vaddr), name); + } + } else if (command_str == "get mappings") { + reply = "Mappings:\n"; + VAddr cur_addr = 0; + + while (true) { + using MemoryAttribute = Kernel::Svc::MemoryAttribute; + + auto mem_info = page_table.QueryInfo(cur_addr).GetSvcMemoryInfo(); + + if (mem_info.state != Kernel::Svc::MemoryState::Inaccessible || + mem_info.base_address + mem_info.size - 1 != std::numeric_limits<u64>::max()) { + const char* state = GetMemoryStateName(mem_info.state); + const char* perm = GetMemoryPermissionString(mem_info); + + const char l = True(mem_info.attribute & MemoryAttribute::Locked) ? 'L' : '-'; + const char i = True(mem_info.attribute & MemoryAttribute::IpcLocked) ? 'I' : '-'; + const char d = True(mem_info.attribute & MemoryAttribute::DeviceShared) ? 'D' : '-'; + const char u = True(mem_info.attribute & MemoryAttribute::Uncached) ? 'U' : '-'; + + reply += + fmt::format(" {:#012x} - {:#012x} {} {} {}{}{}{} [{}, {}]\n", + mem_info.base_address, mem_info.base_address + mem_info.size - 1, + perm, state, l, i, d, u, mem_info.ipc_count, mem_info.device_count); + } + + const uintptr_t next_address = mem_info.base_address + mem_info.size; + if (next_address <= cur_addr) { + break; + } + + cur_addr = next_address; + } + } else if (command_str == "help") { + reply = "Commands:\n get info\n get mappings\n"; + } else { + reply = "Unknown command.\nCommands:\n get info\n get mappings\n"; + } + + std::span<const u8> reply_span{reinterpret_cast<u8*>(&reply.front()), reply.size()}; + SendReply(Common::HexToString(reply_span, false)); +} + Kernel::KThread* GDBStub::GetThreadByID(u64 thread_id) { const auto& threads{system.GlobalSchedulerContext().GetThreadList()}; for (auto* thread : threads) { |